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Tirado-Kulieva VA, Miranda-Zamora WR, Hernández-Martínez E, Pantoja-Tirado LR, Bazán-Tantaleán DL, Camacho-Orbegoso EW. Effect of antifreeze proteins on the freeze-thaw cycle of foods: fundamentals, mechanisms of action, current challenges and recommendations for future work. Heliyon 2022; 8:e10973. [PMID: 36262292 PMCID: PMC9573917 DOI: 10.1016/j.heliyon.2022.e10973] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/13/2022] [Accepted: 09/30/2022] [Indexed: 11/19/2022] Open
Abstract
Freezing is widely used in food preservation, but if not carried out properly, ice crystals can multiply (nucleation) or grow (recrystallization) rapidly. This also affects thawing, causing structural damage and affecting overall quality. The objective of this review is to comprehensively study the cryoprotective effect of antifreeze proteins (AFPs), highlighting their role in the freeze-thaw process of food. The properties of AFPs are based on their thermal hysteresis capacity (THC), on the modification of crystal morphology and on the inhibition of ice recrystallization. The mechanism of action of AFPs is based on the adsorption-inhibition theory, but the specific role of hydrogen and hydrophobic bonds/residues and structural characteristics is also detailed. Because of the properties of AFPs, they have been successfully used to preserve the quality of a wide variety of refrigerated and frozen foods. Among the limitations of the use of AFPs, the high cost of production stands out, but currently there are solutions such as the use the production of recombinant proteins, cloning and chemical synthesis. Although in vitro, in vivo and human studies have shown that AFPs are non-toxic, their safety remains a matter of debate. Further studies are recommended to expand knowledge about AFPs, to reduce costs in their large-scale production, to understand their interaction with other food compounds and their possible effects on the consumer.
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Affiliation(s)
| | | | | | - Lucia Ruth Pantoja-Tirado
- Carrera Profesional de Ingeniería en Industrias Alimentarias, Universidad Nacional Autónoma de Tayacaja Daniel Hernández Morillo, Peru
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Wang D, Li D, Kelland MA, Cai H, Wang J, Xu Y, Lu P, Dong J. Unraveling Amphiphilic Poly( N-vinylcaprolactam)/Water Interface by Nuclear Magnetic Resonance Relaxometry: Control of Clathrate Hydrate Formation Kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4774-4784. [PMID: 35380846 DOI: 10.1021/acs.langmuir.2c00472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Water-soluble amphiphilic polymers are vital chemicals in the oil and gas industry to retard crystal growth of hydrocarbon hydrate via surface adsorption and suppress nucleation of a pristine hydrate nucleus, thereby preventing formation of hydrate blockages in flow lines during oil and natural gas production. Apart from a few theoretical modeling studies, an experimental method to study the polymer/water interface in the crystal growth is critically needed. Here, water motions in the hydration shells of an exemplary kinetic inhibitor, poly(N-vinylcaprolactam), during hydrate formation from the tetrahydrofuran/water system are revealed via nuclear magnetic resonance relaxometry. Unequivocal experiments show that the pivotal interfacial water in the tightly bound state gradually freezes at rates depending on the polymer molecular weight (MW). This is supported by nonfreezable water analysis, which is correlated to the inhibition time. The polymers tune the kinetics of the hydration process via interaction with and perturbation of the water molecules. The free water component in the polymer solution crystallizes at a very slow rate when in partially restricted mobility, whereas the bound water component increases in the reaction, with the polymer/water interface serving as the reaction sites. The appropriate MW (including average MW and polydispersity values) of the inhibitive polymers can give rise to maximal retardation of the hydrate crystal growth. This work will help control other multiphase crystallization kinetic processes through the design of inhibitors or promoters functioning in the interface.
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Affiliation(s)
- Dong Wang
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Dongfang Li
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Malcolm A Kelland
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Stavanger N-4036, Norway
| | - Haokun Cai
- Ningbo Academy of Product and Food Quality Inspection (Ningbo Fiber Inspection Institute), Ningbo, Zhejiang Province 315048, China
| | - Jie Wang
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Ying Xu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Ping Lu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Jian Dong
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
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Selvamani V, Kadian S, Detwiler DA, Zareei A, Woodhouse I, Qi Z, Peana S, Alcaraz AM, Wang H, Rahimi R. Laser-Assisted Nanotexturing and Silver Immobilization on Titanium Implant Surfaces to Enhance Bone Cell Mineralization and Antimicrobial Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4014-4027. [PMID: 35312330 DOI: 10.1021/acs.langmuir.2c00008] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite the great advancement and wide use of titanium (Ti) and Ti-based alloys in different orthopedic implants, device-related infections remain the major complication in modern orthopedic and trauma surgery. Most of these infections are often caused by both poor antibacterial and osteoinductive properties of the implant surface. Here, we have demonstrated a facile two-step laser nanotexturing and immobilization of silver onto the titanium implants to improve both cellular integration and antibacterial properties of Ti surfaces. The required threshold laser processing power for effective nanotexturing and osseointegration was systematically determined by the level of osteoblast cells mineralized on the laser nanotextured Ti (LN-Ti) surfaces using a neodymium-doped yttrium aluminum garnet laser (Nd:YAG, wavelength of 1.06 μm). Laser processing powers above 24 W resulted in the formation of hierarchical nanoporous structures (average pore 190 nm) on the Ti surface with a 2.5-fold increase in osseointegration as compared to the pristine Ti surface. Immobilization of silver nanoparticles onto the LN-Ti surface was conducted by dip coating in an aqueous silver ionic solution and subsequently converted to silver nanoparticles (AgNPs) by using a low power laser-assisted photocatalytic reduction process. Structural and surface morphology analysis via XRD and SEM revealed a uniform distribution of Ag and the formation of an AgTi-alloy interface on the Ti surface. The antibacterial efficacy of the LN-Ti with laser immobilized silver (LN-Ti/LI-Ag) was tested against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The LN-Ti/LI-Ag surface was observed to have efficient and stable antimicrobial properties for over 6 days. In addition, it was found that the LN-Ti/LI-Ag maintained a cytocompatibility and bone cell mineralization property similar to the LN-Ti surface. The differential toxicity of the LN-Ti/LI-Ag between bacterial and cellular species qualifies this approach as a promising candidate for novel rapid surface modification of biomedical metal implants.
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Affiliation(s)
- Vidhya Selvamani
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Sachin Kadian
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | | | - Amin Zareei
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Ian Woodhouse
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Zhimin Qi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Samuel Peana
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Alejandro M Alcaraz
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Rahim Rahimi
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
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Molecular Studies on the Nephroprotective Potential of Celastrus paniculatus against Lead-Acetate-Induced Nephrotoxicity in Experimental Rats: Role of the PI3K/AKT Signaling Pathway. Molecules 2021; 26:molecules26216647. [PMID: 34771053 PMCID: PMC8587739 DOI: 10.3390/molecules26216647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 10/21/2021] [Accepted: 10/28/2021] [Indexed: 12/25/2022] Open
Abstract
Chemicals can induce nephrotoxicity, with damage to different segments of the nephron and deterioration of renal function. Nephrotoxicity due to exposure to a toxin such as carbon tetrachloride, sodium oxalate, or heavy metals is the most common cause of kidney injury. The current study aimed to evaluate the protective effects of Celastrus paniculatus seed extract against lead-acetate-induced nephrotoxicity by evaluating the histopathology, immunohistochemistry, ultrastructure, and phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT) signaling pathway. Twenty-four rats were divided into four groups (n = 6 per group): group 1 contained normal animals and served as the control; group 2 received lead acetate (30 mg/kg body weight (b.w.)/day, oral); group 3 received lead acetate and the standard drug N-acetylcysteine (NAC, 200 mg/kg b.w./day, oral); and group 4 received lead acetate and the ethanolic extract of C. paniculatus seed (EECP; 800 mg/kg b.w./day, oral). Treatment was given for 28 consecutive days. The data were analyzed using one-way analysis of variance with SIGMA PLOT 13 using SYSTAT software followed by Newman–Keul’s test for comparison between the groups. EECP ameliorated the adverse changes caused by lead acetate. PI3K and AKT messenger RNA (mRNA) levels were diminished in lead-acetate-treated rats. Treatment with EECP inhibited the occurrence of shrunken cells, the atrophy of glomeruli, and degenerative changes in renal tubules caused by lead acetate. Interestingly, the PI3K and AKT mRNA levels were significantly increased in EECP-treated animals. Our results clearly evidence for the first time that C. paniculatus seed extract inhibits lead-acetate-induced detrimental changes in kidneys by regulating PI3K/AKT signaling pathways.
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